Ultraviolet water treatment device

Abstract

An ultraviolet water treatment device of an embodiment includes an ultraviolet irradiation tank. The ultraviolet irradiation tank includes a plurality of ultraviolet irradiation modules. The ultraviolet irradiation modules include a plurality of lines of ultraviolet irradiation pipes, a cleaning device and a cleaning device driving unit. The ultraviolet irradiation pipes include a plurality of lines of ultraviolet lamps and a plurality of lines of ultraviolet lamp protective pipes individually protecting the ultraviolet lamps. The cleaning device cleans a surface of each ultraviolet lamp protective pipe. Each ultraviolet irradiation module includes two or three ultraviolet irradiation pipes.

1 . An ultraviolet water treatment device comprising:
 an ultraviolet irradiation tank that is provided with a plurality of ultraviolet irradiation modules including a plurality of lines of ultraviolet irradiation pipes including a plurality of lines of ultraviolet lamps and a plurality of lines of ultraviolet lamp protective pipes individually protecting the ultraviolet lamps, a cleaning device cleaning a surface of each ultraviolet lamp protective pipe, and a cleaning device driving unit driving the cleaning device;   a treated water supply inlet pipe that has a center axis in a direction perpendicular to a center axis of each ultraviolet irradiation pipe and is connected to an end of the ultraviolet irradiation tank; and   a treated water discharge outlet pipe that is connected to the other end of the ultraviolet irradiation tank,   wherein each ultraviolet irradiation module includes two ultraviolet irradiation pipes or three ultraviolet irradiation pipes.   
     
     
         2 . The ultraviolet water treatment device according to  claim 1 , wherein the ultraviolet irradiation tank is formed of a plurality of ultraviolet irradiation units in which the plurality of ultraviolet irradiation modules are individually incorporated, and the ultraviolet irradiation units are integrally disposed in a line. 
     
     
         3 . The ultraviolet water treatment device according to  claim 1 , wherein the ultraviolet irradiation tank has an integral structure formed of a pipe in which the plurality of ultraviolet irradiation modules are integrated. 
     
     
         4 . The ultraviolet water treatment device according to  claim 1 , wherein in the ultraviolet irradiation tank, any one or both of the ultraviolet irradiation module including two ultraviolet irradiation pipes and the ultraviolet irradiation module including three ultraviolet irradiation pipes is incorporated. 
     
     
         5 . The ultraviolet water treatment device according to  claim 1 , wherein the ultraviolet irradiation tank has a box shape having a side with a length equal to or more than outer diameters of the inlet pipe and the outlet pipe. 
     
     
         6 . The ultraviolet water treatment device according to  claim 1 , wherein the ultraviolet irradiation tank has a cylindrical shape having an inner diameter equal to or more than outer diameters of the inlet pipe and the outlet pipe. 
     
     
         7 . The ultraviolet water treatment device according to  claim 5 , wherein a length taken along the center axis of each ultraviolet irradiation pipe is within a range of +200 mm from a light emission length of each ultraviolet lamp. 
     
     
         8 . The ultraviolet water treatment device according to  claim 1 , wherein the inlet pipe and the outlet pipe have an inner diameter within a range in which a flow rate is 2.5 to 3.5 [m/sec] with respect to maximum treatment water quantity of the ultraviolet irradiation tank. 
     
     
         9 . The ultraviolet water treatment device according to  claim 1 , wherein a light emission length of each ultraviolet lamp is within a range of ±200 mm with respect to the inner diameters of the outlet pipe and the inlet pipe. 
     
     
         10 . The ultraviolet water treatment device according to  claim 1 , wherein the ultraviolet irradiation modules are incorporated in the ultraviolet irradiation tank such that positions in height of the ultraviolet irradiation pipes deviate from each other.